Eddie has a more obvious relationship with Catherine. We watch her gradually free herself of dependence on him, as she moves closer to Rodolpho, but Eddie's kiss accelerates the process. She is bitter in her condemnation of Eddie after he has betrayed Marco and Rodolpho, but she shows she still cares for him when she says: "I never meant to do nothing bad to you", as he dies. The two women have a good relationship with each other; this is never as intense as Catherine's relationship with Eddie, but it outlasts it.
Beatrice has reason to be jealous but is generous to Catherine at all times. She knows Eddie has done a terrible thing in calling the authorities, but stands by him. Both women are present as Eddie dies, and their concern makes Alfieri's plea for our sympathy more persuasive. You should know in which episodes each appears, and what both say.
Look at Catherine's relations with Eddie, with Beatrice and with Rodolpho; look at Beatrice in relation to her niece and husband. Is Beatrice's childlessness significant? Look at Catherine's actions which show her closeness to Eddie. She brings him a beer or lights a cigar; Beatrice tells us that she sits on the edge of the bath while Eddie shaves, and walks around in her slip (we do not see this), and Catherine explains to Rodolpho how she can sense Eddie's moods: "I can tell a block away when he's blue in his mind and just wants to talk to somebody..." Catherine's part is ambiguous in several ways: she is, at seventeen, but socially inexperienced, both little girl (Rodolpho calls her this) and adult woman; to Eddie she acts both as daughter and as lover; she is a simple, pretty girl from Brooklyn but Eddie sees her as a "Madonna". (This has nothing to do with the celebrated singer, who was not even born in 1955. It refers to the Virgin Mary as she is depicted in Old Master paintings of the nativity.Madonna literally means "my lady", in Italian - the language of Eddie's native land.)